Basilica of San Simplicio
Olbia’s top sight is this medieval Pisan-Romanesque church, hewn out of Galluran granite. In the apse there are two 13th-century frescoes, the left-hand one depicting San Simplicio, the patron saint of Olbia. The Festa di San Simplicio, Olbia’s biggest festival, is celebrated for three days in mid-May.
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